The Washer,spring Tension, cataloged under National Stock Number 5310-01-285-4018, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Associated Spring Us, Llc Dba Associated Spring Div Milwaukee. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-285-4018 |
| Primary Part Number | B1125-056 |
| Item Name | Washer,spring Tension |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Associated Spring Us, Llc Dba Associated Spring Div Milwaukee |
| Status | ACTIVE |
| Style Designator | SPRING TENSION |
| Material Document and Classification | ASTM A684 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Outside Diameter | 1.125 INCHES MAXIMUM IN |
| Material Thickness | 0.056 INCHES NOMINAL IN |
| Material | STEEL COMP 1075 OVERALL |
| Hole Diameter | 0.567 INCHES MINIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B1125-056 PRIMARY | Associated Spring Us, Llc Dba Associated Spring Div Milwaukee (USA) |
| Reference | Meaning |
|---|---|
| 00636 | 5/9 Secondary reference Anchor/darling Actuator Co |
| B1125-056 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5310-01-285-4018 is a Washer,spring Tension, manufactured by Associated Spring Us, Llc Dba Associated Spring Div Milwaukee, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-285-4018 has 1 manufacturer part number on file: B1125-056 (Associated Spring Us, Llc Dba Associated Spring Div Milwaukee).
Key specifications for B1125-056: Overall Height: 0.084 INCHES NOMINAL IN; Style Designator: SPRING TENSION; Material Document and Classification: ASTM A684 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Outside Diameter: 1.125 INCHES MAXIMUM IN. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.